Dust bag



Feb. 16, 1937 C, c, MUENTEN'ER 2,070,674

DUST BAG Filed Nov. 5, 1935 I INVENTOR (bf/677d C. Mucnfener' ATTORNEYS Patented Feb. 16, 1937 PATENT OFFICE nvs'r BAG Christian C. Muentener, Bogota, N. J., assignor, by mesne assignments, to Utility Innovations Inc., New York, N. Y.

Application November 5, 1935, Serial No. 48,286

6 Claims.

b This invention relates to improvements in dust ags.

Its object is to provide a novel dust receptacle for vacuum cleaners which has many advantages over those heretofore available.

One of its principal objects is to provide a dust bag of such simple and inexpensive construction that it may be thrown away when filled and replaced with a new one.

Another object is to provide-a dust bag with a restricted inlet opening which will prevent spilling of its contents and make it impossible for the operator to insert his hand into it.

A further object is to provide a dust bag with is a self-closing inlet so that it may be handled when filled without loss of its contents.

A still further object of this invention is to improve the material of the bag itself by using porous felt instead of the materials heretofore em- 2 ployed.

These and other objects of the invention will appear from the following specification in which I will describe the invention, the novel features of which will be pointed out in appended claims.

Referring to the drawing,

Fig. 1 is a side elevation of a dust bag which is made according to and embodies the present invention;

Fig. 2 is a sectional elevation of a part of the 3., device shown in Fig. I inserted in the vacuum cylinder of a vacuum cleaner, parts of which are i also shown in this figure;

Fig. 3 is a front elevation, and Fig. 4 a rear elevation of the end of the improved dust bag disk 3b shown in the preceding figures.

l0 designates a fiat circular disk of rigid mate'- rial which is constructed with a central circular orifice II. I! is an inlet spout in the form of a hollow truncated cone afiixed to disk III with its 40 larger base fitting the orifice I I. I3 is a flap valve hingedly connected at ll to the back of disk I II.

This is arranged when closed to cover the orifice I i. It is biased to close by a strip of elastic IS, the

ends of which arecaught and held in slits l8, l6

4%) in the edge of the disk. It is caught under a tab I! pressed out of the flap.

In the specific embodiment shown in the draw- .ing, the disk I0, spout l2 and flap l3 are made of cardboard. This is done to illustrate-a cheap 50 construction and not as a limitation. For the same reason the hinge connection at M is shown as a piece of fabric pasted to the disk l0 and flap I3. The elastic strip I5 and its connection with the disk and the flap also illustrate an ex- 55 tremely inexpensive structure.

20 is a substantially cylindrical bag which I prefer to make of felt because of its low cost and its porosity. The forward or open end of this bag is folded over the edge of the disk l0 and under itself and is stitched thereto along the 6 line 2!. r

In Fig. 2 the novel dust bag is shown in a vacuum cleaner. In this figure designates a vacuum cylinder and 3| its head. 32 is a clamp for securing the head to the cylinder. ible intake tube and 84 its discharge end. It will be seen that the end of the felt bag 20 which overlies the edge of disk i0 forms a gasket between the cylinder 30 and its head and that when the head is clamped onto the cylinder the dust 16 bag is held in place firmly. When thus positioned the discharge end 34 of the intake'tube extends slightly into the inlet spout l2.

When a vacuum is created within the cylinder 30, the porosity of the bag 20 causes air and what- 2 ever dust and dirt which may be drawn through the tube 33 to be drawn into the bag 20 through spout l2 and orifice H. The flap valve l3 will swing into some such position as that indicated at ISA (Fig. 2) during this operation. 5

When a sufiicient amount of dirt has accumulated in the bag 20, the cylinder head 3| is removed and the bag taken out and thrown away. The fiap valve l3 will then be closed so that the dust and dirt will not escape from the bag. Even 30 without the check valve the restricted opening formed by the orifice II and spout I2 will facilitate the removal of the bag without spilling its contents and also make it impossible for one to insert his hand into the bag. 35

The various novel features disclosed herein may be used singly or together and I intend no limitations other than those imposed'by the appended claims.

What I claim is: 40 I l. A self-closing dust receiving unit for vacuum I cleaners comprising a substantially fiat disk constructed with an orifice, an outwardly tapered spout on one side of the disk over said orifice, a fiat flap valve-hingedly connected to the other side of the disk and arranged to close the orifice,

said disk, spout and valve being constructed of cardboard, an elastic strip stretchedacross the flap valve with its end portions caught in slits in they edge of the disk, and a porous bag permanently aflixed to the disk.

3. A self-closing dust receiving unit for vacuum cleaners, adapted to be inserted in the vacuum chamber of a vacuum cleaner, comprising a substantially fiat disc constructed with an orifice, an outwardly tapered spout on one side of the disc over said orifice, the smaller end of said spout adapted to receive one end of the suction hose of the vacuum cleaner when the parts are a. whole and adapted to be removed with its contents and thrown away.

5. A self-closing dust receiving unit for vacuum cleaners comprising a substantially flat disc constructed with an orifice forming a restricted opening, a check valve over the orifice, and a sellsustaining porous bag permanently and. directly afiixecl to the disc, said unit being detachable as a whole and adapted to be removed with its contents and thrown away. a

6. A dust receiving, unit forvacuum cleane comprising a substantially flat disc constructed with an orifice forming a restricted opening, an outwardly tapered spout on one side of the disc over said orifice, the smaller end of said spout being adapted to receive one end of the suction hose of a vacuum cleaner when the parts are in assembled position, and a self-sustaining porous bag permanently and directly aifixed to the disc and extending from the disc .away from 

